hope this helps, is volume 1 http://books.google.com/books?id=zvw_AAAAYAAJ&pg=PA7&lpg=PA7&dq=%22maryland+regiments%22&source=bl&ots=rgYPHnDwfM&sig=7ydqten5QR-LNvacaT1LbG1f1mE&hl=en&ei=ULzVTJaVBoOBlAefhID9CA&sa=X&oi=book_result&ct=result&resnum=3&ved=0CB0Q6AEwAjgK#v=onepage&q=%22army%20of%20the%20potomac%22&f=false